diff options
Diffstat (limited to 'activesupport/test/file_watcher_test.rb')
-rw-r--r-- | activesupport/test/file_watcher_test.rb | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/activesupport/test/file_watcher_test.rb b/activesupport/test/file_watcher_test.rb new file mode 100644 index 0000000000..7b4d4be24f --- /dev/null +++ b/activesupport/test/file_watcher_test.rb @@ -0,0 +1,233 @@ +require 'abstract_unit' +require 'fssm' +require "fileutils" +require "timeout" + + +class FileWatcherTest < ActiveSupport::TestCase + class DumbBackend < ActiveSupport::FileWatcher::Backend + end + + def setup + @watcher = ActiveSupport::FileWatcher.new + + # In real life, the backend would take the path and use it to observe the file + # system. In our case, we will manually trigger the events for unit testing, + # so we can pass any path. + @backend = DumbBackend.new("RAILS_WOOT", @watcher) + + @payload = [] + @watcher.watch %r{^app/assets/.*\.scss$} do |pay| + pay.each do |status, files| + files.sort! + end + @payload << pay + end + end + + def test_use_triple_equals + fw = ActiveSupport::FileWatcher.new + called = [] + fw.watch("some_arbitrary_file.rb") do |file| + called << "omg" + end + fw.trigger(%w{ some_arbitrary_file.rb }) + assert_equal ['omg'], called + end + + def test_one_change + @backend.trigger("app/assets/main.scss" => :changed) + assert_equal({:changed => ["app/assets/main.scss"]}, @payload.first) + end + + def test_multiple_changes + @backend.trigger("app/assets/main.scss" => :changed, "app/assets/javascripts/foo.coffee" => :changed) + assert_equal([{:changed => ["app/assets/main.scss"]}], @payload) + end + + def test_multiple_changes_match + @backend.trigger("app/assets/main.scss" => :changed, "app/assets/print.scss" => :changed, "app/assets/javascripts/foo.coffee" => :changed) + assert_equal([{:changed => ["app/assets/main.scss", "app/assets/print.scss"]}], @payload) + end + + def test_multiple_state_changes + @backend.trigger("app/assets/main.scss" => :created, "app/assets/print.scss" => :changed) + assert_equal([{:changed => ["app/assets/print.scss"], :created => ["app/assets/main.scss"]}], @payload) + end + + def test_more_blocks + payload = [] + @watcher.watch %r{^config/routes\.rb$} do |pay| + payload << pay + end + + @backend.trigger "config/routes.rb" => :changed + assert_equal [:changed => ["config/routes.rb"]], payload + assert_equal [], @payload + end + + def test_overlapping_watchers + payload = [] + @watcher.watch %r{^app/assets/main\.scss$} do |pay| + payload << pay + end + + @backend.trigger "app/assets/print.scss" => :changed, "app/assets/main.scss" => :changed + assert_equal [:changed => ["app/assets/main.scss"]], payload + assert_equal [:changed => ["app/assets/main.scss", "app/assets/print.scss"]], @payload + end +end + +module FSSM::Backends + class Polling + def initialize_with_low_latency(options={}) + initialize_without_low_latency(options.merge(:latency => 0.1)) + end + alias_method_chain :initialize, :low_latency + end +end + +class FSSMFileWatcherTest < ActiveSupport::TestCase + class FSSMBackend < ActiveSupport::FileWatcher::Backend + def initialize(path, watcher) + super + + monitor = FSSM::Monitor.new + monitor.path(path, '**/*') do |p| + p.update { |base, relative| trigger relative => :changed } + p.delete { |base, relative| trigger relative => :deleted } + p.create { |base, relative| trigger relative => :created } + end + + @thread = Thread.new do + monitor.run + end + end + + def stop + @thread.kill + end + end + + def setup + Thread.abort_on_exception = true + + @payload = [] + @triggered = false + + @watcher = ActiveSupport::FileWatcher.new + + @path = path = File.expand_path("../tmp", __FILE__) + FileUtils.rm_rf path + + create "app/assets/main.scss", true + create "app/assets/javascripts/foo.coffee", true + create "app/assets/print.scss", true + create "app/assets/videos.scss", true + + @backend = FSSMBackend.new(path, @watcher) + + @watcher.watch %r{^app/assets/.*\.scss$} do |pay| + pay.each do |status, files| + files.sort! + end + @payload << pay + trigger + end + end + + def teardown + @backend.stop + Thread.abort_on_exception = false + end + + def create(path, past = false) + wait(past) do + path = File.join(@path, path) + FileUtils.mkdir_p(File.dirname(path)) + + FileUtils.touch(path) + File.utime(Time.now - 100, Time.now - 100, path) if past + end + end + + def change(path) + wait do + FileUtils.touch(File.join(@path, path)) + end + end + + def delete(path) + wait do + FileUtils.rm(File.join(@path, path)) + end + end + + def wait(past = false) + yield + return if past + + begin + Timeout.timeout(1) do + sleep 0.05 until @triggered + end + rescue Timeout::Error + end + + @triggered = false + end + + def trigger + @triggered = true + end + + def test_one_change + change "app/assets/main.scss" + assert_equal({:changed => ["app/assets/main.scss"]}, @payload.first) + end + + def test_multiple_changes + change "app/assets/main.scss" + change "app/assets/javascripts/foo.coffee" + assert_equal([{:changed => ["app/assets/main.scss"]}], @payload) + end + + def test_multiple_changes_match + change "app/assets/main.scss" + change "app/assets/print.scss" + change "app/assets/javascripts/foo.coffee" + assert_equal([{:changed => ["app/assets/main.scss"]}, {:changed => ["app/assets/print.scss"]}], @payload) + end + + def test_multiple_state_changes + create "app/assets/new.scss" + change "app/assets/print.scss" + delete "app/assets/videos.scss" + assert_equal([{:created => ["app/assets/new.scss"]}, {:changed => ["app/assets/print.scss"]}, {:deleted => ["app/assets/videos.scss"]}], @payload) + end + + def test_more_blocks + payload = [] + @watcher.watch %r{^config/routes\.rb$} do |pay| + payload << pay + trigger + end + + create "config/routes.rb" + assert_equal [{:created => ["config/routes.rb"]}], payload + assert_equal [], @payload + end + + def test_overlapping_watchers + payload = [] + @watcher.watch %r{^app/assets/main\.scss$} do |pay| + payload << pay + trigger + end + + change "app/assets/main.scss" + change "app/assets/print.scss" + assert_equal [{:changed => ["app/assets/main.scss"]}], payload + assert_equal [{:changed => ["app/assets/main.scss"]}, {:changed => ["app/assets/print.scss"]}], @payload + end +end |